The game at Selhurst against Fredrikstad showed this precisely, I'd recommend Jim tax dodger Ratcliffe takes a look at that.
We have been close to perfection at Palace (slightly better finishing required for true perfection) because almost every side in the PL looks at their fixture against us, no matter where we are in the league, and thinks there is a chance for 3 points from this one so we'll give it a go. Even the ones at the bottom, especially later in the season they need to get away from the relegation places.
Glasner would need to change the Palace 3-4-2-1 formation at Man U or as it says in the article many teams outside the top 6 would settle for a draw against United if they only looking to counter
I'm surprised the Man U fans / press aren't making more of a case of Iraola rather than Glasner